Printing-telegraph.



PATENTBD OUT. 29, 1907.

' B. w. COGHRAN.

PRINTING TELEGRAPH. APPLICATION FILED APR.19, 1905. v

UNITED" wings PATENT OFFICE.

BERRY W. 'COOHRAN, F. LO S ANGELES. CALIFORNIA.

. PRINTING-TELEGRAPH;

No. 869,420. Specificationofd'aetters Patent. Patented Oct. 29,1907.

V Application filed April-19. 1905- fisrial No. 256| &2 5i V Q all oi these magnets being included under the general Be it'knownthat I, BYEBRY Co cr r uim'a citizen :term printing'meighetsl: I of the United States, residing in IlosAngeles, iii-the Referring to 1, a series or plurality of printing county of Los Angeles, State: of California, have in-, magnets 1 are provided, each included in a local-cir- 5 vented new and useful Improvements in Printingc'uit 2; these local circuits being arranged-in groups, Tclcgraphs, of which'the jollowing 'is a specification. the members of each group having a common connec- The mainobject'of .this invention is to provide 9. tion at one side of the printing magnets to'a return printing telegraphi-oivlektreme rapidity in operation wire, the respective return wires of the groups being and simplicity ofgconstruction.' indicated at 3, 4, 5, and- 6. On the other side of the To all whom. it may concern; Y

10 The invention relates to printing telegraphs oithe magnets 1, the connections 2 lead to permutative con- 7 29' of selections.

'cl'giss whereinaplhrali'ty-oi printing magnets are selectnection wires 7, the consecutive magnets 1 ofeachively o p'erated by aseries of impulses, each of said groupbeing connected seriau'm with the wires 7, there a magnets being brought operation by a series of beingas many wires 7 as there are magnets l in each impulses hhving'distinguishing;characteristics. group; The-wiresa7 are subdivided into groups, each 15 "An object of invention is .to reduce the number comprising four wires, and the printingmagnets 1 are :dfihipulse's required, and thisnd I provide for sesimilarly subdivided into four sub-groups connected lection by means-pfiinipui ses which have a plurality respectively with the four groups of wires 7. A pluofi diherent i'kinds of (listiiiguishing characteristics, ralityof wires 8 lead from the corresponding wires 7 of combined-or permutated to g ive the requisite number. each group, these wires 8 being divided into four groups,

I. 1 I i the wires 8 of the-first group being connected to the The system comprises, inzconnectiorr' with a. telefirst wire of each of the groupsof wires 7, the wires 8 graph line, a ani l-la ieciver respectiyely of the next group connected to the second wires adapted to send 'a'hdi 'ieceiveirnpulses representing of each grou'p fw fl sfirendso on- These connections the charactei's be priii'ted. n the present case these enable selection of any one'oilth magnets 1, the selec- '25 impulses havetwo .distinguishing l ti'nds of character tion oi a particular'rnagnet being effected by establishistics, namely, difierentpolarity and different strength. ing connection tothe wire 3, 4, etc-.,- which,leads to 'By combining these difierent characteristics four disthat group,'and by establishing connection through a 'tinguishably diiferent liinds'of impulses may be sent. wire 8 to the particular magnet desired in that group. By sending a'plurality or series-ofsuch impulses in -In this latter. connection,.the selection of the group of 30 succession'to represent a giverr character, and varying wires 8 determines which'bne'oi the four wires of the the order of the'iinpul'sesflin the different series, the sub-groups of wires 7 etcl, will be selected; while the selective capacity 'of the system may be increased to selection of theparti'cular wire 8 in the selected group any desired extent. "Thus, according to the laws of etc., will determine which one of the groups of wires permutation and combination, two impulses in which 7 will be selected. These three selections necessary 35 .the four different characteristics-are combined or perto pick out any one of the magnets are performed by mutated may he made to select sixteen characters, three sets or groups of relays, 13,14, 15, which are and three, successive impulses for each character may 4 brought into operative ,connection successively by he made to select sixty four characters. Three immeans of a circuit changer 20, and the selection within pulses are therefore sufficient for most purposes, and the groups is effected under control of four main line 40 the system as herein shown, is adapted, :for operation relays, 9, 10, 11, 12. Each of the sets of relays coniwith three impulses for each character. prises four relay magnets, the armatures 16 of the mag- The accompanying drawing illustrates -the' invennets l3 controlling connection to wires 3; 4, 5, 6, from tion: i the local battery 18, one side of whichis connected by Figure 1 is a diagram of the complete system. Fig. a wire 19 to the armatures 16, and the other side of said 45 2 is an elevation of one of the printing magnet devices battery being connected by wire 21 to the armaturcs in the receiver. Fig. 3 'is a detail perspective of a -ro- 22 of magnets 14 which control connection to four wires tating circuitchanger in the receiver. Fig. 4 is' a ver- 23 leading to contact springs 24 adapted for connection I tica-l section thereof. Fig. 5 is aperspective of the with the wires 8 aforesaid, said contact springs 24 being transmitter. 1 i 50 The invention is intended for operation in c onnec- These groups of relays 13, 14,. 151, are brought into action with a receiver of the class wherein a plurality tion successively or sequentially-by means of a circuit controlled by the arrnatures 25. of the relay magnets 15.

of type bars are provided similar in operation to the ordinary typewritefl'anda series or plurality of printing magnets are provided operating on said type bars j 5 to. effect the printing, similar magnets being provided =-ior effeetingthe ieedingffand line 'spag iiig operations changer or controlling device; the same comprising, for example, a cylinder or drum 20 mounted on a shaft 26 driven byany suitable means, indicated at 26, and

provided with three -or'-a multiple of three, (in thiscase, circmnfefiyntially equidistant contacts-or I 30 quent interruption of the main line.'

segments 27 connected respectivelytorings 28, 28, 28, from whose brushes 29 wires 30 30, 30 lead through'local batteries 31 31, 31', respectively to one side of the several groups of relays 13,14, -15. The 5 other side of the relays of each group are connected to f wires 32 leading to the movable contacts 33 which are "formed'on or carried by the armature levers 34 of relay magnets 9, 10, 11, 12. Thus as any one of the said relay magnets operates it will draw the corresponding 10 contact 33 against the cylinder 2(land establish connection to a particular one of the relay magnets 13,14, 15. 'Thisconnection is established 'first, for one of the relay magnets 13; then, as the cylinder 20 rotates, magnets 14 and 15 are brought successively into circuit. 15 The last connection, :by the third impulse, completes the sequence for one character or operation, and it is necessary to hold the precedently or first and second operated relays 13, 14, in operated position until this sequence is completed or, in other words, until the third relay 15 has operatcd to close thefinal connection to the individual'printing magnet, and the latter has beenoperated. For this purpose the armature of each relay magnet 13 and 14 controls a pair of insulated contacts 35, the severalpairs of contacts35 beingarranged in parallel branches across-a local'circuit 36, including a battery 37, the branch circuit through each pair of contacts including a coil 38 of the corresponding relay magnet 13 or 14, so as to maintain the energization of the relay magnet irrespective of the subse- To restore the'relay devices to normal or unoperated position at the endof each operation, a circuit breaker is provided for local circuit 36 comprising a disk 39 on shaft 26 of cylinder 20 and spring contacts 36 con- 35 nected to circuit 36 and engaging said disk to normally close said circuit, the disk 39 having an insulating part 39 that comes under these contacts as the disk is about to complete its semi-rotation, so as to -momentarily break the circuit and allow the operated relays-13, 14, 40 to release their armatures V I Cylinder 20 is operated step by step, moving one step for each impulse-f being, for example, controlled by-an escapement wheel 40 whose anchor 40 is operated by the armature 41 of a magnet 42 energiied by a battery 43 in a local'circuit 44 controlled bya relay 45 in the main line, said relay being responsive to all impulses that come over the line, so as to allow the cyilnder 20 I to move one step (in this case one-sixth of a revolution) for each impulse received.

Each magnet 9, 10, H 12', controls the connection to a corresponding one of the relays in ea'ch of thegroups 13, 14, 15, and said magnets 9, etc., are controlled through local circuits 46, including a battery 47, by main line relays 9, 10, ll, 12, Whose 'armatures' 48 are adapted to selectively respond to four different kinds of impulses obtained, for eirample, by the com binatiorrof two different polarities and two different strengths. For this purpose devices 9, 10, 11 and 12 are formed as polarized relays, 9 and 10, responding, for

130 example, to positive impulses and relays 11, 12 to negative impulses. and relays 9 and 11 respectively requiringfor their operation stronger current than relays 10 and 12. As a strong impulse will operate both the relays of corresponding polarity, means are provided yeby the operation of the strong relay will render 'tive, andthe wires 59, 60, negative.

' by any one key, but the sequence of said impulses.

printing magnet may be connected to operate the type bar 55 by a connecting link 55.

The'transmitter comprises a circuit changer 51 ,for successively shifting the operating connections of the main line 52, to three local circuits 53, 53, 53, and a plurality of keys 56 are provided to bring into connec: tion with the line andwith these local circuits electromotive force generating means of different polarity and different strength, the said electromotive foreegenen v ating means being applied through four leads 57, 58 59,. 60, connected to two batteries 61., 61, which at their inner ends are connected together and' to the line. Wires 57 and 58 lead from, points of successively higher potential of battery 61, and wires 59 and 60 lead from 7 points of successively higher potential of battery 61, the polarity of wires 57, 58, being for example, posi- Each key 56 optrates by means of an insulating arm 66 three contact springs 63 which, on depression of the key, contact with three fixed terminals 64 connected respectively to the three circuit changer wires 53 53, 53". The circuit changer may consist of a disk 5]. on I a shaft 62 mounted to rotate, and having suitable driving means, 62 and having a single contactavhich in ferent for. the respective keys. Thus, for the key shown '105 at the left of Fig. 1, lowermost spring 63 is connected-to the wire 60, the next spring to the wire 57, and the top spring the wire 58; and in the next keythe lowermost spring is connected to the wire 57, the next spring to the wire .58, and the top spring to the wire 60; thus i changing the order of connection; the next key has all three springs connected to wire 59; the key at the right has the three contacts connected respectively to wires .60, 59 and 57, etc. There will be as many of these keys as there are printing magnets, and the connections of 1 1 5 the contact springs for said keys to the several battery wires 57, 58, 59, 60, will be differently combined or pernmtated, these connections determining not only the character of the impulseswhich will besent to the line The transmitter further preferably comprises certain controlling and interlocking devices comprising a release bar-7O pivoted at 71 and engaged by lugs 72 on the key stems 56, said bar having a projecting am: 73

' lug 89 on the depressed key-stern, to holdth ekey down, I

- wires 67 to the wire 58 and plus battery 61 at an interv mediate or low strength point. From the other side 70, arms 73, 74, and lug 75, to raise rod 76 out of the path of shoulder 79, whereupon the shaft will start to turn under the influence of its operating means, above referred to, causing rotation of circuit changer 51. As the shaft 62 turns, a projection 8] of a disk 82 on said shaft strikes a lever 83 to which is loosely connected a link 84 pivoted to arm 74; this movement pulling the arm 74 off of arm 73 and allowing the rod 76 to move into position against the stopdisk' SOJeady to fall in front of the shoulder 79 when the disk completes its rotation. When the key 56 is returned to normal position by its spring 86, bar is turned by spring 87 to depress arm 73, whereupon arm 74 is pulled over said arm 73 by a spring 74. Rod 84 slides through lever 83 a suffi- ,cient distance to enablereturn of the lever independn ently of the'rod. A disk 88 on shaft 62 has a notch 88 in which normally engages the end of a lever 90, pivoted at 91 and carrying a locking bar 92, which on rotation of disk 88 is forcedtoward key stem 56, thereby engaging ovcr a and under the lugs 89 of the other key stems to lock them against operation until the revolution is completed.

The operation is as followsz The transmitting operator will depress that one of the keys 56" which corresponds to the character to be transmitted. This operates through the releasing mechanism above described to start the rotatidn of shaft 62 and disk 51, thus establishing "connection from ground, indicated at 95 in Fig. 1, through the disk 51 and the brushes 65, through the transmitter and the main line battery to the line. 1 Thus, assuming that the key corresponding to the group at the extreme leftof Fig. 1 has been operated, the circuit will first be established-from said ground through the disk 51 to brush 65 leading to wire 53; thence'by contacts 64, 63, and one of the of said battery the line 52 leads through escapement relay 45 and thence through the magnets 12, 11, 10, 9, in series, and by a connection 52 to ground at 96. The negative side of the battery being brought to line in this case the impulse will be negative, and only relay 12 will be energised, relay 11 not responding to the weak current sent by the section of battery included. The armature 48 of said relay will-close the local circuit 46 leading to magnet 12 which will operatc its armature 34 to draw "the'corresponding con' tact 33 against the cylinder 20. Meanwhile, the operation of relay magnet 45 hascontrolled the escapement mechanism, but the initial movement thereof in such operation is slight and not sufficient to change the contact relations, so that the contact 33' will engage with the initial contact strip of cylinder 20 connected, say, to wire 30. Current will therefore pass in local circuit 30 from the battery 31 through contact of cylinder 20, contact 33 and wire 32 to one of the magnets 13,in this case the one at the left of the group,and by wire 30 back to the battery 31. The magnet 13 so energized will operate its armature to close the local circuit 3 leading to the first group of printing magnets, and this armature will be retained in its operatcdposition by the means above described. Further rotation of the transmitter disk 51 will estabto the line operating the strong plus relay 9.

lish the contactthrough brush 65 to wire 53, and operate'd transmitter key will continue connection from said wire 53 through contacts 64, 63, and wire 67 to the combination wire 57 leading to the positive side of battery 61', thus sending' a negative impulse of full strength to the line and energizing relay magnets 11 and 12, but magnet 12 is not operated for its circuit is broken by armature 48 of the strong relay 11, and

only the corresponding magnet 11 is operated. The cessation of the precedent or first impulse has resulted in release of the escapement, allowing the cylinder 20 to turn to bring the next segment into position opposite the contacts 33 so that energization of relay 11 will establish connection from battery 31, throughwire 30, a segment of cylinder 20,;contact 33 and corresponding wire-32, to one of the inagncts 14 in the second group; 6., the secondfrom the extreme left therein, the circuit being continued from said magnet by wire 30 back to the battery 31.

;-The magnet so energized will attract its armature to closeconnection through wires'23 to a certain contact spring'24 of each of the groups controlled by the relays 15. The final impulse for the character is then transmitted through wire 53, contacts 64, 63, of the operated key, combination wire 60, to the negative side of battery 61, thus sending a positive impulse The commutator or controlling device 20 has meanwhile been shifted to bring the third local battcry31f in operative connection, the circuit leading therefrom through the wire 30", a segment of cylinder 20, contact 33, one of the wires 32, to one of the magnets 15,- iirthis case the one at the extreme right,and thence by wir e 30 back to the battery 31. The magnet 15 so 'energized'operates its armature to close all of the contacts 24 of the corresponding group, thereby completing final. connection for the operation of the printing circuit, the same being traced as followsz-From battery 18, through wire 19, operated armature 16 of the first group of relays 13.; then by,wire 3 to the com-' mon c onnection for the first group of printing magnets, those on the right; then through the first magnet in the third sub group of the first main group counting from the right, through a connection 2 to one of the wires 7; thence by a Wire 8 to the first spring in the fourth group of contacts 24 operated by relays 15; thence by wire 23 to thecontact and armature of the operated relay 14 of the second group, and so to the other side of battery 18. The printing magnet having thus been operated to perform theprinting, or

other described operation, the sequence of operation is concluded by circuit breaker 39 operating as above described to break the retaining circuits for the first and second sets of relays l3, 14, thereby allowing armatures thereof to return to normal position and restoring the system .to its original condition ready for the transmission of another sequence of impulses, the transmitter having been meanwhile restored to normal position as above described.

Various modifications may be made in the system above described and in the various devices used therein, without departing from my invention,

What I claim is:

1. A plurality of printing magnets, circuits therefor connecting said magnets in groups, sets of relay devices operatively connected to select the difierent groups and the different magnets of each group, a movable contact means operating to shift the, operating line connection successively to the respective sets of relay devices, a line and relays therein, respondingte electric impulses having different combinations of characteristics, and controlling the different relays in the respective sets, and means for impart ing to the line electric impulses having such ditterent combinations of characteristics; A v

2. The combination of a plurality of printing magnets, a

line, relayslcontrolled sequentially by the line to establish operating connection to individualprinting-magnets, a re- 'taining circuit for each precedently operating relay, in-

cluding a supplementary energizing coil for said rel' ay, said retaining circuits including contacts controlled by the re- 'spective precedentiy operating relays, a movable ,controlling device operating to bring the relays sequentially into operating connection and comprising a circuit breaker for said retaining circuit. I

3. A plurality ofprinting magnets, circuits therefor connecting said magnets in groups, sets of relay devices operatively connected to select the difie'rentgroups and the different magnets of each group, a movable contact means operating to shift the operating line connection successlvely to the respective sets of relay devices, a line and-relays therein responding to electric impulses having different characteristics and controlling the ditferent relays in the respective sets, means for imparting to the line a sequence of impulses for operating thelineireiays, and means for retaining the precedently-operated selecting relays in operated position until the sequence is completed.

controlling the relay devices in the aforesaid sets, and

means responsive to all line impulses controlling the operationbf the rotary circuit changer.

G. A printing telegraph transmitter comprising electromotive force generating means, and leads connected thereto at points of different polarity and difierent electroniotive force, a circuit changer and a pluralityof leads con nected thereto and sequentially brought into the line connections thereby, a plurality of keys and contacts controlled by thekeys and the circuit changer to send a se-' quence of impulses of different character to the line, stop means for the circuit changer controlled by the keys to release the circuit changer for operation on operation of any key, and means'controlled by the circuit changer to disconnect the connection between the keys and the stop means,

8. A printing telegraph transmitter comprising a rotary circuit changer, a plurality of keys, a line, means controlled by the keys and the circuit changer to send a sequence of impulses of diil'erent character to the line, stop means for the circuit changer controlled by the keys to release the circuit changer for operation on operation of any key, means controlled by the circuit changer to disconnect the connection between the keys and thc stop means, and restoring means reestablishing such connection on partial rotation of the circuit changer.

9. In" a printing telegraph transmitter, a plurality of keys, a release bar engaged thereby, a rotary circuit changer, a stop therefor, an arm connected tosaid stop and movable into and out of engagement with the aforesaid release bar, a spring tending to draw the arm into such engagement, a cam connected to the circuit changer, and means operated by said cam and connected to aforesaid arm to release its engagement.

In testimony whereof, I have hereunto set my hand at Los Angeles California this 12th day of 'April 1905.

4 BERRY W. COCHRAN.

In presence of ARTHUR P. KNIGHT, JULIA TOWNSEND. 

